A few of us in the business of supporting Ubuntu near here have reached the consensus for the new Ubuntu release for users to not attempt an upgrade of Ubuntu to 11.04 without someone very technically competent there to fix things should they go wrong.
This is what I will be advising to all the Ubuntu users I look after and for those I directly look after I will be skipping the release altogether until hardware stability can be more readily assessed.
The reason for the cautionary stance is because so far, testing on non-intel hardware looks grim. There are a lot of regressions which I hope will clear up after release, but you can never tell. There is an increase in lock-ups reported from people who’ve been testing the daily-builds, inoperable wifi and graphics card issues. All core issues which would break any user who isn’t very technically competent.
I’ll probably by using 11.04 myself (when I can get it working) as it is a very cool release with lots of interesting new changes to try out and awesome functionality. The developers have had a heroic battle to get all the changes in and keep everything mostly together; but I can’t recommend it for everybody just yet.